window.UNIQUE_TAG = 0;
Date.prototype.format=function(fmt) {           
    var o = {           
    "M+" : this.getMonth()+1, //月份           
    "d+" : this.getDate(), //日           
    "h+" : this.getHours()%12 == 0 ? 12 : this.getHours()%12, //小时           
    "H+" : this.getHours(), //小时           
    "m+" : this.getMinutes(), //分           
    "s+" : this.getSeconds(), //秒           
    "q+" : Math.floor((this.getMonth()+3)/3), //季度           
    "S" : this.getMilliseconds() //毫秒           
    };           
    var week = {           
    "0" : "/u65e5",           
    "1" : "/u4e00",           
    "2" : "/u4e8c",           
    "3" : "/u4e09",           
    "4" : "/u56db",           
    "5" : "/u4e94",           
    "6" : "/u516d"          
    };           
    if(/(y+)/.test(fmt)){           
        fmt=fmt.replace(RegExp.$1, (this.getFullYear()+"").substr(4 - RegExp.$1.length));           
    }           
    if(/(E+)/.test(fmt)){           
        fmt=fmt.replace(RegExp.$1, ((RegExp.$1.length>1) ? (RegExp.$1.length>2 ? "/u661f/u671f" : "/u5468") : "")+week[this.getDay()+""]);           
    }           
    for(var k in o){           
        if(new RegExp("("+ k +")").test(fmt)){           
            fmt = fmt.replace(RegExp.$1, (RegExp.$1.length==1) ? (o[k]) : (("00"+ o[k]).substr((""+ o[k]).length)));           
        }           
    }           
    return fmt;           
}         

function get_unique_id() {
    if(window.UNIQUE_TAG >= 10) {
        window.UNIQUE_TAG = 0;
    }
    var id = new Date().format("yyyyMMddHHmmss") + window.UNIQUE_TAG;
    window.UNIQUE_TAG++;
    return id;
}


function create_random_string(n) {
    var chars = ['0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'];
    var res = "";
     for(var i = 0; i < n ; i ++) {
         var id = Math.ceil(Math.random()*35);
         res += chars[id];
     }
     return res;
}

function switch_serial(str) {
    var arr = [];
    for(var i = 0; i < str.length; i++) {
        arr.push(str.charAt(i));
    }
    arr = arr.sort();
    var _str = (String)(arr.concat()).replace(/\,/g, "");
    var str1 = _str.substr(0, 3);
    var str2 = _str.substr(3, 3);
    var str3 = _str.substr(6, 3);
    
    return "0" + str1 + "-" + str2.substr(0, 1) + "0" + str2.substr(1) + "-" + str3.substr(0, 2) + "0" + str3.substr(2) + "-" + _str.substr(9);
}